Former Warner Music Group chief Lyor Cohen is now Kanye West’s close adviser. We hear that Cohen, who left Warner Music in September, has been advising West on his music deals, including an upcoming tour. “He’s 100 percent in Kanye’s camp,” said a source. Rumors have swirled that Cohen will soon launch his own talent-management company to structure 360-degree, multiplatform deals for artists. Music industry heavy hitters — including former Def Jam exec Kevin Liles and Warner Bros. Records chief Todd Moscowitz, a former Cohen disciple who left the company last week — have been mentioned as potential partners. A friend of Cohen said, “Lyor is a friend of Kanye’s, and many artists reach out to him for advice.”